Controlled generation of N2O5 and NO3 radical using air plasmas and its agricultural applications

ORAL · Invited

Abstract

Atmospheric-pressure plasmas (APPs) have been of great interest and are widely used in medical, agricultural, and environmental applications. In particular, air APP can convert nitrogen (N2), oxygen (O2), and water (H2O) molecules on site into gaseous reactive species HxNyOz [for example, ozone (O3), nitric oxide (NO), nitrogen dioxide (NO2), and hydroxyl radical (OH)], which can play key roles in those applications, potentially increasing the utilization of air to a great extent. The control of the HxNyOz gas composition is very important for the further development of air APP technology, however, is still challenging. We have ever engaged in composition control and quantification of HxNyOz generated in air APP-activated gas and developed a new APP system for the selective synthesis of dinitrogen pentoxide (N2O5) [1]. In addition, we recently found that the plasma-generated N2O5 has many beneficial effects (e.g., bactericidal/virus-inactivating [2], activation of plant immunity [3], nitrogen fertilization [4,5]) in agricultural fields. More recently, we developed a new technology of high density (~ 1014 cm-3) NO3 radical generation from air, extended from the N2O5 synthesis technology. In the presentation, strategy and detailed setup for the composition control of the HxNyOz species, quantification technique, and investigation of the biological effects will be discussed with specific examples in agricultural application.

[1] S. Sasaki, K. Takashima, and T. Kaneko, Ind. Eng. Chem. Res. 60, 798 (2021).

[2] T. Kaneko, K. Takashima, and S. Sasaki, Plasma Chem. Plasma Process. in press (2024). https://doi.org/10.1007/s11090-024-10461-z

[3] D. Tsukidate, K. Takashima, S. Sasaki et al., PLOS ONE 17, e0269863 (2022).

[4] T. Yamanashi, S. Takeshi, S. Sasaki et al., Plant Mol. Biol. 114, 35 (2024).

[5] S. Takeshi, K. Takashima, S. Sasaki et al., Plasma Process. Polym. in press (2024). https://doi.org/10.1002/ppap.202400096

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Presenters

  • Shota Sasaki

    Tohoku University, Japan

Authors

  • Shota Sasaki

    Tohoku University, Japan

  • Keisuke Takashima

    Tohoku University, Graduate School of Engineering, Tohoku University

  • Toshiro Kaneko

    Tohoku University, Graduate School of Engineering, Tohoku University